Research on white organic light emitting diodes for lighting

• Project/Area Number: 22560013
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Applied materials science/Crystal engineering
• Research Institution: Kyoto Sangyo University
• Principal Investigator: TSUBOI Taiju 京都産業大学, コンピュータ理工学部, 教授 (70065861)
• Co-Investigator(Kenkyū-buntansha): TANIKAWA Masayuki 京都産業大学, 理学部, 教授 (80207175)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2010: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: 有機分子 / 有機半導体デバイス / 有機EL / 白色有機EL素子 / タンデム型発光素子 / エネルギー伝達 / 有機EL照明 / 電子正孔再結合 / 白色発光高分子 / 外部量子効率 / 燐光発光 / 電子正孔再結合領域 / 発光共重合高分子

Research Abstract

Experimental work was done for organic light emitting diodes (OLEDs) which are highly efficient and functional. An OLED with four exciplexes showed a super-broad band quite similar to solar radiation spectrum. Another OLED with a charge generation layer inserted between blue fluorescence emitting layer and yellow phosphorescence emitting layer showed high efficiencies of 120 cd/A and 50 lm/W. Single molecule which emits multi-color light was successfully synthesized for not only polymer but also small molecule.

Research Products

• [Journal Article] Energy Transfer in Polyfluorene Copolymer Used for White-light Organic Light Emitting Device (2013)
  • Author(s): H. Wang、Y. Xu、T. Tsuboi、他
  • Journal Title: Organic Electronics Volume: Vol.14、No.3 Issue: 3 Pages: 827-838
  • DOI: 10.1016/j.orgel.2012.12.039
  • Peer Reviewed
• [Journal Article] Photophysical Properties of Chirality: Experimental and Theoretical Studies of (R)- and (S)-Binaphthol Derivatives as a Prototype Case (2013)
  • Author(s): T. Tsuboi、Z.F. An、Y. Nakai、他
  • Journal Title: Chemical Physics Volume: Vol.412 Pages: 34-40
  • DOI: 10.1016/j.chemphys.2012.12.001
  • Peer Reviewed
• [Journal Article] Recombination zone in white organic light emitting diodes with blue and orange emitting layers (2012)
  • Author(s): T. Tsuboi、他4名
  • Journal Title: Optical Materials Volume: Vol.34、No.12 Issue: 12 Pages: 2025-2029
  • DOI: 10.1016/j.optmat.2012.03.005
  • Peer Reviewed
• [Journal Article] Tandem organic light emitting diodes with KBH4 doped 9、10-bis(3- (pyridin-3-yl)phe- nyl) anthracene connected to the charge generation layer (2012)
  • Author(s): L. Duan、 T. Tsuboi、他3名
  • Journal Title: Optics Express Volume: Vol.20、No.13 Issue: 13 Pages: 14564-14572
  • DOI: 10.1364/oe.20.014564
  • Peer Reviewed
• [Journal Article] Enhancement of efficiency and lifetime of blue organic light emitting diodes using two dopants in single emitting layer (2012)
  • Author(s): J.N. Yu、C. Li、B. Wei、他
  • Journal Title: Advances in Materials Science and Engineering Volume: Vol.2012 Pages: 1-4
  • DOI: 10.1155/2012/247976
  • Peer Reviewed
• [Journal Article] Photoluminescence and magnetic circular dichroism of IrQ(ppy)2-5Cl (2012)
  • Author(s): S. Polosan、 I.C. Radu、 T. Tsuboi
  • Journal Title: Journal of Luminescence Volume: 132、No.4 Issue: 4 Pages: 998-1002
  • DOI: 10.1016/j.jlumin.2011.12.002
  • Peer Reviewed
• [Journal Article] Photoluminescence of bis(8-hydroxyquinoline) zinc (Znq2) and magnesium (Mgq2) (2012)
  • Author(s): T. Tsuboi、 Y. Nakai、 Y. Torii
  • Journal Title: Central EuropeanJournal of Physics Volume: Vol.10、No.2 Pages: 524-528
  • URL: http://www.springerlink.com/content/p1j4h11972102701/
  • Peer Reviewed
• [Journal Article] Effect of ITO surface treatment on organic light emitting diodes (2012)
  • Author(s): T. Tsuboi、T. Kishimoto、K. Wako、他3名
  • Journal Title: Journal of Nanoscience and Nanotechnology Volume: Vol.12、No.4 Issue: 4 Pages: 3692-3695
  • DOI: 10.1166/jnn.2012.5662
  • Peer Reviewed
• [Journal Article] An alternative way to use the triplet energy of fluorescent dyes in organic light-emitting devices via an external iodide (2012)
  • Author(s): X. Xing、T. Tsuboi、Y. Nakai、他6名
  • Journal Title: Organic Electronics Volume: Vol.13、No.1 Issue: 1 Pages: 195-198
  • DOI: 10.1016/j.orgel.2011.10.019
  • Peer Reviewed
• [Journal Article] Conjugated Asymmetric Donor Substituted 1,3,5-Triazines: Novel Host Materials for Blue Phosphorescent Organic Light-Emitting Diodes (2011)
  • Author(s): Z.F. An、R.F. Chen、 他
  • Journal Title: Chemistry - A European Journal Volume: Vol.17、No.39 Issue: 39 Pages: 10871-10878
  • DOI: 10.1002/chem.201190190
  • Peer Reviewed
• [Journal Article] Vibrational spectroscopy study on α and ss phasesin iridium-complex-containing polyfluorenes (2011)
  • Author(s): T. Tsuboi、H.F. Shi、Y. Nakai、他3名
  • Journal Title: Physica Status Solidi (C) Volume: Vol.8、No.9 Issue: 9 Pages: 2713-2716
  • DOI: 10.1002/pssc.201084050
  • Peer Reviewed
• [Journal Article] Electron injection into hole-transporting layer from emission layer in organic light emitting diodes (2011)
  • Author(s): T. Tsuboi、他4名
  • Journal Title: Physica Status Solidi (C) Volume: Vol.8、No.9 Issue: 9 Pages: 2903-2906
  • DOI: 10.1002/pssc.201084048
  • Peer Reviewed
• [Journal Article] Photoluminescence properties of fluorone dyes in bio-related films at low temperatures (2011)
  • Author(s): T. Tsuboi、A. Penzkofer、E. Slyusareva、 他
  • Journal Title: Journal of Photochemistry and Photobiology A: Chemistry Volume: Vol.222、No.2-3 Issue: 2-3 Pages: 336-342
  • DOI: 10.1016/j.jphotochem.2011.07.006
  • Peer Reviewed
• [Journal Article] Photoluminescence properties of copolymers with iridium-complex Ir(thq)2(dbm) units in the fluorene main chain (2011)
  • Author(s): T. Tsuboi、他5名
  • Journal Title: Physics Procedia Volume: Vol.14 Pages: 34-37
  • DOI: 10.1016/j.phpro.2011.05.008
  • Peer Reviewed
• [Journal Article] Recombination zone in organic light emitting diodes with emitting layer of diphenyl - anthracene-derivative host (2011)
  • Author(s): C. Li、T. Tsuboi、他
  • Journal Title: PhysicsProcedia Volume: Vol.14 Pages: 213-216
  • DOI: 10.1016/j.phpro.2011.05.043
  • Peer Reviewed
• [Journal Article] Degradation of organic light emitting diodes with cleaned ITO and MoO3 hole-injection layer (2011)
  • Author(s): T. Kishimoto、K. Wako、K. Matsuda、他
  • Journal Title: Physics Procedia Volume: Vol.14 Pages: 235-238
  • DOI: 10.1016/j.phpro.2011.05.048
  • Peer Reviewed
• [Journal Article] Improved Energy Transfer through the Formation of β-Phase for Polyfluorenes ContainingPhosphorescent Iridium(III) Complexes (2011)
  • Author(s): H. Shi、 他6名
  • Journal Title: Journal of Physical Chemistry: C Volume: Vol.115、No.23 Issue: 23 Pages: 11749-11757
  • DOI: 10.1021/jp201000q
  • Peer Reviewed
• [Journal Article] Electron injection into hole-transporting layer from emission layer in organic light emitting diodes (2011)
  • Author(s): 坪井泰住
  • Journal Title: Physica Status Solidi C Volume: (掲載決定 印刷中)
  • Peer Reviewed
• [Journal Article] Selective Synthesis of Facial and Meridianal Isomers of Alq3 (2010)
  • Author(s): T. Tsuboi、Y. Torii
  • Journal Title: Molecular Crystals and Liquid Crystals Volume: Vol.529 Issue: 1 Pages: 42-52
  • DOI: 10.1080/15421406.2010.495672
  • Peer Reviewed
• [Journal Article] Photoluminescence characteristics of green and blue emitting Alq3 organic molecules in crystals and thin films (2010)
  • Author(s): T. Tsuboi、Y. Torii
  • Journal Title: Journal of Non-Crystalline Solids Volume: Vol.356、No.37-40 Issue: 37-40 Pages: 2066-2069
  • DOI: 10.1016/j.jnoncrysol.2010.05.033
  • Peer Reviewed
• [Journal Article] Recent advances in white organic light emitting diodes with a single emissive dopant (2010)
  • Author(s): T. Tsuboi
  • Journal Title: Journal of Non-Crystalline Solids Volume: Vol.356、No.37-40 Issue: 37-40 Pages: 1919-1927
  • DOI: 10.1016/j.jnoncrysol.2010.05.034
  • Peer Reviewed
• [Journal Article] Recent advances in white organic light emitting diodes with a single emissive dopant (2010)
  • Author(s): 坪井泰住
  • Journal Title: Journal of Non-Crystalline Solids Volume: 356 Pages: 1919-1927
  • Peer Reviewed
• [Journal Article] Selective Synthesis of Facial and Meridianal Isomers of Alq_3 (2010)
  • Author(s): 坪井泰住. 鳥居康子
  • Journal Title: Molecular Crystals and Liquid Crystals Volume: 529 Pages: 42-52
  • Peer Reviewed
• [Presentation] White organic light emitting diodes for flat panel lighting (2011)
  • Author(s): 坪井泰住
  • Organizer: FNMA'11 - Functional and Nanoー structured Materials
  • Place of Presentation: 西ポリメリアン工科大学、ポーランド
  • Year and Date: 2011-09-08
• [Presentation] Electron-hole recombination zone in white organic light emitting diodes with two emitting layers、招待 講演 (2011)
  • Author(s): 坪井泰住
  • Organizer: The 3rd International Workshop on Advanced Spectroscopy and Optical Materials (IWASON3)
  • Place of Presentation: グダンスク大学、ポーランド
  • Year and Date: 2011-07-22
• [Presentation] Electron-hole recombination zone in white organic light emitting diodes with two emitting layers (2011)
  • Author(s): 坪井泰住
  • Organizer: The 3rd International Workshop on Advanced Spectroscopy and Optical Materials
  • Place of Presentation: グダンスク大学(ポーランド)(招待講演)
  • Year and Date: 2011-07-22
• [Presentation] Recombination zone in organic light emitting diodes with emitting layer of diphenyl - anthracene-derivative host (2010)
  • Author(s): 坪井泰住
  • Organizer: The 9th International Conference on Nano-Molecular Electronics (ICNME2010)
  • Place of Presentation: 神戸ポートピアホテル
  • Year and Date: 2010-12-15
• [Presentation] Degradation of organic light emitting diodes with cleaned ITO and MoO3 hole-injection layer (2010)
  • Author(s): T. Kishimoto(代表者)
  • Organizer: The 9th International Conference on Nano-Molecular Electronics (ICNME2010)
  • Place of Presentation: 神戸ポートピアホテル
  • Year and Date: 2010-12-14
• [Presentation] Photoluminescence properties of copolymers with iridium-complex Ir(thq)_2(dbm) units in the fluorene main chain (2010)
  • Author(s): 坪井泰住
  • Organizer: The 9th International Conference on Nano-Molecular Electronics (ICNME 2010)
  • Place of Presentation: 神戸ポートピアホテル
  • Year and Date: 2010-12-14
• [Presentation] Electron injection into hole-transporting layer from emission layer in organic light emitting diodes、 The Fourth International Conference on Optical (2010)
  • Author(s): 坪井泰住
  • Organizer: Optoelectronic and Photonic Materials and Applications (ICOOPMA2010)
  • Place of Presentation: ブタペスト国際会議場、ハンガリー
  • Year and Date: 2010-08-18
• [Book] 照明用途へ向けた高効率白色有機EL素子、書籍「これからの蓄・省エネルギー材料の開発における機能性付与技術」 (2012)
  • Author(s): 坪井泰住
  • Publisher: 技術情報協会出版
• [Book] これからの蓄・省エネルギー材料の開発における機能性付与技術 (分担執筆：第7章第2節[6]「照明用途へ向けた高効率白色有機EL素子」） (2012)
  • Author(s): 坪井泰住
  • Total Pages: 8
  • Publisher: 技術情報協会
• [Book] 有機EL素子の青色発光用ホスト材料の評価、書籍「有機EL照明材料の開発と評価技術」 (2010)
  • Author(s): 坪井泰住
  • Publisher: サイエンス&テクノロジー株式会社出版
• [Book] 有機金属錯体の合成と評価:発光性電子輸送材料Alq3、書籍「有機EL照明材料の開発と評価技術」 (2010)
  • Author(s): 鳥居康子、坪井泰住
  • Publisher: サイエンス&テクノロジー株式会社出版
• [Remarks]
  • URL: http://www.cc.kyoto-su.ac.jp/~tsuboi/
• [Remarks] 坪井泰住研究室ホームページ
  • URL: http://www.cc.kyoto-su.ac.jp/~tsuboi/
• [Remarks]
  • URL: http://www.cc.kyoto-su.ac.jp/~tsuboi/
• [Remarks]
  • URL: http://www.cc.kyoto-su.ac.jp/-tsuboi/